TL;DR: Wal*Mart employees wear their Social Security cards pinned to their shirts all day.
When I worked at Wal*Mart (three years ago) I remember the dawning moment of comprehension when I curiously scanned my name tag at my register, only to see an oddly familiar number come up on my LCD screen--my SSN, zero-padded to 12 digits per UPC standard.
Being somewhat security-minded (and having had family members' identities stolen before.) I brought this to the attention of my manager, who admitted she had misplaced or lost her own name badge more than once, but was utterly unconcerned about it. This despite the fact that badges also have the full name of the associate printed right below the bar code mentioned. In fact, I had seen the badges dropped on the ground in the parking lot, left pinned to the outsides of lockers, etc.
This guy has a pretty good posting about it, but any Wal*Mart Redditor with a name badge and a smartphone can confirm with a UPC scanner app.
Anyone else know/work for a company that has laughably awful practices like this?